<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            font-size: 16px;
        }

        .head{
            line-height: 200%;
            background-color: aqua;
        }
        .zi{
            font-size: 20px;
        }
    </style>
</head>
<body>
    <div class="head">
        你不要吵
        <div class="zi">呼呼呼</div>
    </div>
</body>
</html>